Electric railway-signal



(No Model.)

J.-1V[0M. SCOTT.

ELEOTRIG RAILWAY SIGNAL. N0. 360,1'75. Patented Mar. 29, 1887.

by k INVBNTOB:

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ATTORNEYS.

UNiTE TATES PATENT Fries.-

JOSEPH MCMASTERS SCOTT, OF ALLEGHENY, PENNSYLVANIA.

ELECTRIC RAILWAY-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 360,175, dated March 29, 1887.

Application filed April 16, 1886. Serial No. 109,083.

To all whom it may concern.-

Be it known that I, Josnrn MoMAsrERs SCOTT, of Allegheny, in the county of Allegheny "and State of Pennsylvania, have invented a new and Improved Electrical Block- Signal for Railroads, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved electrical block signal, which the operator cannot change without metifying the central office.

The invention consists of an electric circuit carrying the central office and the signal box, and of a signalblock, which, when moved, alternately opens and closes the main-line circuit.

The invention also consists in various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of my improvement. Fig. 2 is an end elevation of the same. Figs. 3 and 4 represent modifications hereinafter more fully described. Fig. 5 is an enlarged front elevation ofthe spring-bar and the notched disk.

Each of the signal-boxes, A A, &c., is attached to a post, B, is constructed in any suitable manner, and is provided with the stationary signal-block O and the lamp D, for use at night. On an arm, E, secured to either the inside or outside of the box A, is mounted at each side a shaft, F, on each of which shafts is fastened a red signal-block, G, a notched disk or wheel, H, and a crank-arm, I, on which is fastened the rod J, extending downward.

A springbar, K, is secured at its inner end to the arm E, and is provided with a lug, L, which engages with the periphery of the notched disk H. The free inner end of the bar K can connect with the central fixed plate, M, fastened to the arm E. The outer end of the barK of the first signal-box, A, in the line connects by a wire, N, with an ordinary Morse (No model.)

instrument, an indicator, or an annunciator situated at the central station or office, 0.

The different signal-boxes in the line are connected with each other by the wire P, and the last signal-box in the line connects, by means of the wire Q, with the ground, thus establishing a complete circuit with the main office O.

The operation is as follows: If the operator at any of the signal-boxes throws the red signal-block G upward by pulling 011 the rod J, attached to the crank-arm I, secured on one of the shafts F, it causes said signal-block G to swing outward, and as the notched disk H turns with the shaft F it alternately connects and disconnects the lug L of the spring-lever K with the central plate, M, whereby the mainline circuit is alternately'opened and closed, and this is indicated by the respective instru ment in the central officc O. erator moves the signal-block wrongly, the central office is notified of this fact at once and can communicate in any suitable manner with the operator, who can correct his 1nis take. The notches in one of the disks on a signal-box may be so arranged that when said disk H makes one-quarter revolution it telegraphs, for instance, according to the Morse key, S. B. XVest, as shown in Fig. 5,whi1e the notches on the other disk of the same box indicate S. B. Eastthat is, signal-block standing east.

Instead of having a signal-block swinging on the shaft, it may also be constructed as shown in Fig. 3, in which the signal-block is suspended by a rope, R, passing over a pulley, and is provided on one edge with notches which engage the lug 011 the spring-bar K when the signal-block slides upward. In Fig. 4 the arrangement is similar, but the notched strip is attached directly to the wire or rope.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- In an electric railway signaling system, a closed circuit including a number of signaling devices and a recording device located at a station, which signaling devices comprise a In case the opvisual signal having thereon a series ofirregfact is recorded at the station by means of the ularly-arranged notches and adapted to be several impulses sent over the line, substanoperated by hand, and a contact-point engagtially as and for the purpose set forth.

ing with said notches, which visual signal, as it JOSEPH MOMASTERS SCOTT.

is operated or manipulated, effects the move- Witnesses:

ment of said notches past said contact-point,

O. E. CORNELIUS, whereby when a signal is set or displayed the HARVEY HENDERSON. 

